.page-faq {
  background-color: var(--night);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  background-image:
    linear-gradient(rgba(47, 74, 66, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(47, 74, 66, 0.22) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: -1px -1px;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0;
}

.page-faq .section-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.18;
  letter-spacing: 0.005em;
  margin: 10px 0 0;
  color: var(--ink);
}

.page-faq .lede {
  color: var(--muted);
  font-size: 16.5px;
  margin: 12px 0 0;
  max-width: 62ch;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(36px, 7vw, 84px) 0 clamp(24px, 4vw, 40px);
  background: radial-gradient(900px 340px at 88% 0%, rgba(140, 255, 102, 0.08), transparent 70%);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 5.6vw, 3.6rem);
  line-height: 1.1;
  letter-spacing: 0.005em;
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-faq .faq-hero__lede {
  margin: 20px 0 0;
  max-width: 60ch;
  font-size: 17px;
  color: var(--muted);
}

.page-faq .faq-hero__facts {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-hero__facts .chip {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-faq .faq-hero__facts .chip__label {
  font-size: 12.5px;
  color: var(--muted);
}

.page-faq .faq-hero__facts .chip__val {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--digit);
  letter-spacing: 0.04em;
}

/* ---------- 快速上手 ---------- */
.page-faq .quick {
  padding: clamp(32px, 6vw, 68px) 0 clamp(36px, 6vw, 72px);
  border-top: 1px solid var(--line);
}

.page-faq .quick-steps {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap);
}

.page-faq .quick-step {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--lime);
  padding: 22px 20px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .quick-step__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-faq .quick-step__title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.25;
  margin: 0;
  color: var(--ink);
}

.page-faq .quick-step__text {
  margin: 0;
  font-size: 15.5px;
  color: var(--muted);
}

.page-faq .quick-media,
.page-faq .sync-media {
  margin-top: 30px;
}

/* ---------- 索引 + 正文 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: clamp(48px, 8vw, 100px);
}

.page-faq .faq-index {
  border-left: 2px solid var(--line);
  padding-left: 18px;
}

.page-faq .faq-index__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 12px;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 16px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 15px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 74, 66, 0.6);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.page-faq .faq-index__link .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--digit);
  letter-spacing: 0.06em;
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-body {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 0;
}

.page-faq .faq-group {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 3px solid var(--lime);
  padding: clamp(22px, 3.4vw, 38px);
  scroll-margin-top: 118px;
}

.page-faq .faq-group--gold {
  border-left-color: var(--gold);
}

.page-faq .faq-group[data-active="true"] .eyebrow {
  color: var(--lime);
}

.page-faq .faq-group__lede {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 15.5px;
  color: var(--muted);
}

.page-faq .faq-kv {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-kv .kv__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-kv .kv__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--gold);
  min-width: 152px;
}

.page-faq .faq-kv .kv__v {
  font-size: 15px;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  margin-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 0;
  font-weight: 700;
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink);
  transition: color 0.16s ease;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary:hover {
  color: var(--lime);
}

.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 4px;
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 5px;
}

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  background: var(--lime);
}

.page-faq .faq-item__mark::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .faq-item__mark::after {
  left: 8px;
  top: 0;
  width: 2px;
  height: 18px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.page-faq .faq-item[open] .faq-item__mark::after {
  transform: rotate(90deg);
  opacity: 0;
}

.page-faq .faq-item__a {
  max-width: 68ch;
  padding: 0 32px 22px 0;
  font-size: 15.5px;
  color: var(--muted);
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a a {
  color: var(--lime);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--gold);
}

/* ---------- 出现动效 ---------- */
.page-faq [data-reveal-state="idle"] {
  opacity: 0;
  transform: translateY(8px);
}

.page-faq [data-reveal-state="in"] {
  opacity: 1;
  transform: none;
  transition: opacity 0.45s ease, transform 0.45s ease;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .quick-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-hero h1 {
    max-width: 24ch;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: 252px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 112px;
    align-self: start;
  }

  .page-faq .faq-index__list {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-group {
    padding: clamp(28px, 3vw, 42px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal-state="idle"],
  .page-faq [data-reveal-state="in"] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-faq .faq-item__mark::after {
    transition: none;
  }
}